src/gallium/winsys/drm/radeon/core/radeon_drm.c

   1 /*
   2  * Copyright © 2009 Corbin Simpson
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  14  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  15  * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  16  * NON-INFRINGEMENT. IN NO EVENT SHALL THE COPYRIGHT HOLDERS, AUTHORS
  17  * AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  20  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * The above copyright notice and this permission notice (including the
  23  * next paragraph) shall be included in all copies or substantial portions
  24  * of the Software.
  25  */
  26 /*
  27  * Authors:
  28  *      Corbin Simpson <MostAwesomeDude@gmail.com>
  29  *      Joakim Sindholt <opensource@zhasha.com>
  30  */
  31
  32 #include "softpipe/sp_winsys.h"
  33
  34 #include "radeon_drm.h"
  35
  36 /* Helper function to do the ioctls needed for setup and init. */
  37 static void do_ioctls(int fd, struct radeon_winsys* winsys)
  38 {
  39     struct drm_radeon_gem_info gem_info = {0};
  40     struct drm_radeon_info info = {0};
  41     int target = 0;
  42     int retval;
  43     drmVersionPtr version;
  44
  45     info.value = (unsigned long)&target;
  46
  47     /* We do things in a specific order here.
  48      *
  49      * DRM version first. We need to be sure we're running on a KMS chipset.
  50      * This is also for some features.
  51      *
  52      * Then, the PCI ID. This is essential and should return usable numbers
  53      * for all Radeons. If this fails, we probably got handed an FD for some
  54      * non-Radeon card.
  55      *
  56      * The GB and Z pipe requests should always succeed, but they might not
  57      * return sensical values for all chipsets, but that's alright because
  58      * the pipe drivers already know that.
  59      *
  60      * The GEM info is actually bogus on the kernel side, as well as our side
  61      * (see radeon_gem_info_ioctl in radeon_gem.c) but that's alright because
  62      * we don't actually use the info for anything yet. */
  63
  64     version = drmGetVersion(fd);
  65     if (version->version_major != 2) {
  66         fprintf(stderr, "%s: DRM version is %d.%d.%d but this driver is "
  67                 "only compatible with 2.x.x\n", __FUNCTION__,
  68                 version->version_major, version->version_minor,
  69                 version->version_patchlevel);
  70         drmFreeVersion(version);
  71         exit(1);
  72     }
  73
  74     info.request = RADEON_INFO_DEVICE_ID;
  75     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  76     if (retval) {
  77         fprintf(stderr, "%s: Failed to get PCI ID, "
  78                 "error number %d\n", __FUNCTION__, retval);
  79         exit(1);
  80     }
  81     winsys->pci_id = target;
  82
  83     info.request = RADEON_INFO_NUM_GB_PIPES;
  84     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  85     if (retval) {
  86         fprintf(stderr, "%s: Failed to get GB pipe count, "
  87                 "error number %d\n", __FUNCTION__, retval);
  88         exit(1);
  89     }
  90     winsys->gb_pipes = target;
  91
  92     info.request = RADEON_INFO_NUM_Z_PIPES;
  93     retval = drmCommandWriteRead(fd, DRM_RADEON_INFO, &info, sizeof(info));
  94     if (retval) {
  95         fprintf(stderr, "%s: Failed to get Z pipe count, "
  96                 "error number %d\n", __FUNCTION__, retval);
  97         exit(1);
  98     }
  99     winsys->z_pipes = target;
 100
 101     retval = drmCommandWriteRead(fd, DRM_RADEON_GEM_INFO,
 102             &gem_info, sizeof(gem_info));
 103     if (retval) {
 104         fprintf(stderr, "%s: Failed to get MM info, error number %d\n",
 105                 __FUNCTION__, retval);
 106         exit(1);
 107     }
 108     winsys->gart_size = gem_info.gart_size;
 109     winsys->vram_size = gem_info.vram_size;
 110
 111     debug_printf("radeon: Successfully grabbed chipset info from kernel!\n"
 112                  "radeon: DRM version: %d.%d.%d ID: 0x%04x GB: %d Z: %d\n"
 113                  "radeon: GART size: %d MB VRAM size: %d MB\n",
 114                  version->version_major, version->version_minor,
 115                  version->version_patchlevel, winsys->pci_id,
 116                  winsys->gb_pipes, winsys->z_pipes,
 117                  winsys->gart_size / 1024 / 1024,
 118                  winsys->vram_size / 1024 / 1024);
 119
 120     drmFreeVersion(version);
 121 }
 122
 123 /* Guess at whether this chipset should use r300g.
 124  *
 125  * I believe that this check is valid, but I haven't been exhaustive. */
 126 static boolean is_r3xx(int pciid)
 127 {
 128     return (pciid > 0x3150) && (pciid < 0x796f);
 129 }
 130
 131 /* Create a pipe_screen. */
 132 struct pipe_screen* radeon_create_screen(struct drm_api* api,
 133                                          int drmFB,
 134                                          struct drm_create_screen_arg *arg)
 135 {
 136     struct radeon_winsys* rwinsys = radeon_pipe_winsys(drmFB);
 137     do_ioctls(drmFB, rwinsys);
 138
 139     if (!is_r3xx(rwinsys->pci_id) ||
 140         debug_get_bool_option("RADEON_SOFTPIPE", FALSE)) {
 141         return softpipe_create_screen((struct pipe_winsys*)rwinsys);
 142     } else {
 143         radeon_setup_winsys(drmFB, rwinsys);
 144         return r300_create_screen(rwinsys);
 145     }
 146 }
 147
 148 /* Create a pipe_context. */
 149 struct pipe_context* radeon_create_context(struct drm_api* api,
 150                                            struct pipe_screen* screen)
 151 {
 152     struct radeon_winsys* rwinsys = (struct radeon_winsys*)screen->winsys;
 153
 154     if (!is_r3xx(rwinsys->pci_id) ||
 155         debug_get_bool_option("RADEON_SOFTPIPE", FALSE)) {
 156         return softpipe_create(screen);
 157     } else {
 158         return r300_create_context(screen, rwinsys);
 159     }
 160 }
 161
 162 boolean radeon_buffer_from_texture(struct drm_api* api,
 163                                    struct pipe_screen* screen,
 164                                    struct pipe_texture* texture,
 165                                    struct pipe_buffer** buffer,
 166                                    unsigned* stride)
 167 {
 168     /* XXX fix this */
 169     return r300_get_texture_buffer(screen, texture, buffer, stride);
 170 }
 171
 172 /* Create a buffer from a handle. */
 173 /* XXX what's up with name? */
 174 struct pipe_buffer* radeon_buffer_from_handle(struct drm_api* api,
 175                                               struct pipe_screen* screen,
 176                                               const char* name,
 177                                               unsigned handle)
 178 {
 179     struct radeon_bo_manager* bom =
 180         ((struct radeon_winsys*)screen->winsys)->priv->bom;
 181     struct radeon_pipe_buffer* radeon_buffer;
 182     struct radeon_bo* bo = NULL;
 183
 184     bo = radeon_bo_open(bom, handle, 0, 0, 0, 0);
 185     if (bo == NULL) {
 186         return NULL;
 187     }
 188
 189     radeon_buffer = CALLOC_STRUCT(radeon_pipe_buffer);
 190     if (radeon_buffer == NULL) {
 191         radeon_bo_unref(bo);
 192         return NULL;
 193     }
 194
 195     pipe_reference_init(&radeon_buffer->base.reference, 1);
 196     radeon_buffer->base.screen = screen;
 197     radeon_buffer->base.usage = PIPE_BUFFER_USAGE_PIXEL;
 198     radeon_buffer->bo = bo;
 199     return &radeon_buffer->base;
 200 }
 201
 202 static struct pipe_texture*
 203 radeon_texture_from_shared_handle(struct drm_api *api,
 204                                   struct pipe_screen *screen,
 205                                   struct pipe_texture *templ,
 206                                   const char *name,
 207                                   unsigned stride,
 208                                   unsigned handle)
 209 {
 210     struct pipe_buffer *buffer;
 211     struct pipe_texture *blanket;
 212
 213     buffer = radeon_buffer_from_handle(api, screen, name, handle);
 214     if (!buffer) {
 215         return NULL;
 216     }
 217
 218     blanket = screen->texture_blanket(screen, templ, &stride, buffer);
 219
 220     pipe_buffer_reference(&buffer, NULL);
 221
 222     return blanket;
 223 }
 224
 225 static boolean radeon_shared_handle_from_texture(struct drm_api *api,
 226                                                  struct pipe_screen *screen,
 227                                                  struct pipe_texture *texture,
 228                                                  unsigned *stride,
 229                                                  unsigned *handle)
 230 {
 231     int retval, fd;
 232     struct drm_gem_flink flink;
 233     struct radeon_pipe_buffer* radeon_buffer;
 234     struct pipe_buffer *buffer = NULL;
 235
 236     if (!radeon_buffer_from_texture(api, screen, texture, &buffer, stride)) {
 237         return FALSE;
 238     }
 239
 240     radeon_buffer = (struct radeon_pipe_buffer*)buffer;
 241     if (!radeon_buffer->flinked) {
 242         fd = ((struct radeon_winsys*)screen->winsys)->priv->fd;
 243
 244         flink.handle = radeon_buffer->bo->handle;
 245
 246         retval = ioctl(fd, DRM_IOCTL_GEM_FLINK, &flink);
 247         if (retval) {
 248             debug_printf("radeon: DRM_IOCTL_GEM_FLINK failed, error %d\n",
 249                     retval);
 250             return FALSE;
 251         }
 252
 253         radeon_buffer->flink = flink.name;
 254         radeon_buffer->flinked = TRUE;
 255     }
 256
 257     *handle = radeon_buffer->flink;
 258     return TRUE;
 259 }
 260
 261 static boolean radeon_local_handle_from_texture(struct drm_api *api,
 262                                                 struct pipe_screen *screen,
 263                                                 struct pipe_texture *texture,
 264                                                 unsigned *stride,
 265                                                 unsigned *handle)
 266 {
 267     struct pipe_buffer *buffer = NULL;
 268     if (!radeon_buffer_from_texture(api, screen, texture, &buffer, stride)) {
 269         return FALSE;
 270     }
 271
 272     *handle = ((struct radeon_pipe_buffer*)buffer)->bo->handle;
 273
 274     pipe_buffer_reference(&buffer, NULL);
 275
 276     return TRUE;
 277 }
 278
 279 struct drm_api drm_api_hooks = {
 280     .name = "radeon",
 281     .create_screen = radeon_create_screen,
 282     .create_context = radeon_create_context,
 283     .texture_from_shared_handle = radeon_texture_from_shared_handle,
 284     .shared_handle_from_texture = radeon_shared_handle_from_texture,
 285     .local_handle_from_texture = radeon_local_handle_from_texture,
 286 };
 287
 288 struct drm_api* drm_api_create()
 289 {
 290 #ifdef DEBUG
 291     return trace_drm_create(&drm_api_hooks);
 292 #else
 293     return &drm_api_hooks;
 294 #endif
 295 }